Is Selenium Safe with Semaglutide, Liraglutide (Ozempic, Wegovy)?
Free · No account · based on published sources including NIH ODS, FDA drug labels, and peer-reviewed literature
Ensure adequate selenium intake through diet (Brazil nuts — 1–2 per day provides approximately 100–200 mcg) or consider supplementing with 55–200 mcg/day of selenomethionine. Do not exceed 400 mcg/day to avoid selenotoxicity. Monitor thyroid function (TSH, free T3/T4) annually, as GLP-1 therapy is associated with thyroid C-cell stimulation in preclinical models.
Why this interaction occurs
Selenium is a critical cofactor for iodothyronine deiodinases that convert inactive T4 to active T3 thyroid hormone. Caloric restriction and reduced dietary variety during GLP-1 therapy may lower selenium intake. Additionally, GLP-1 receptor agonists carry a class warning regarding thyroid C-cell tumors (based on rodent data), making thyroid monitoring and nutritional support particularly relevant. Adequate selenium also supports glutathione peroxidase antioxidant defense.
Evidence
Evidence level: limited.
Reported safety data
The FDA’s adverse event reporting system (FAERS) has received 146,406 reports mentioning Semaglutide, Liraglutide (Ozempic, Wegovy). This reflects reported cases involving the medication in general — not confirmed causation, and not specific to the Semaglutide, Liraglutide (Ozempic, Wegovy) + supplement combination on this page.
FAERS reports are voluntary and cannot prove that a drug caused an event. Do not use report counts to assess the safety of this specific drug-supplement pair.
Frequently asked questions
Related interactions
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Educational only — not medical advice.
Always confirm with your doctor or pharmacist.